This will be my first conversion.
The bike I want to convert is a VSF Fahrradmanufaktur T900. The frame & fork are made of steel.
Front, rear or mid-drive:
Some background information:
I tried to build a system with the components of “https://bmsbattery.com”.
Motor:
First option: Controller, Display & Battery:
Second option: Controller, Display & Battery:
Brakes: I have Magura HS33 hydraulic brakes on my bike.
Padel assistant sensor:
Torque armes:
Speed sensor:
The bike I want to convert is a VSF Fahrradmanufaktur T900. The frame & fork are made of steel.
Front, rear or mid-drive:
- The bike has a rohloff in the rear, and I want to keep it. So, rear drive is not possible.
- It has an eccentric bottom bracket which makes it more difficult to make use of a mid-drive system. The eccentric bottom bracket will become useless and I have to find another system to keep the tension on the chain. Mid-drives seems also to be less reliable than hub drives.
→ A front hub motor was not my first choise, but it seems to be the best option with this bike.
Some background information:
- Desired max speed on level ground: 35kph
- Desired max range at cruising speed: 25km (I can charge the battery at work) or 50km.
- Wheel size of the bike I want to convert: 28”
- Brake type of motor wheel: Magura HS33 hydraulic rim brakes
- Rider weight: 85kg
- Terrain: Mostly flat, 2 bridges
- This bike is used daily to go to work. So, the most important thing is reliability! Budget is not so important, but I am looking for a good quality/price ratio.
I tried to build a system with the components of “https://bmsbattery.com”.
Motor:
- Q100H 36V350W Front Driving EBike Hub Motor
My wheel diameter is 28” (=700) which has a circumference of 2220mm.
260rpm → Max speed will be 260rpm*60min/h*2220/10^6km=34,6km/h.
https://bmsbattery.com/ebike-kit/630-q100h-36v350w-front-driving-ebike-hub-motor-ebike-kit.html?search_query=q100h&results=5
Are there better alternatives?
First option: Controller, Display & Battery:
- Controller: S06S 250W Torque Simulation Sine Wave Controller for 24Volts or 36Volts battery pack E-Bike System.
I read that this controller has cheap Mosfets, and heats up quickly. Is this going to give problems with my setup? Are there better alternatives?
https://bmsbattery.com/ebike-kit/546-s06s-250w-torque-simulation-sine-wave-controller-ebike-kit.html - Display: S-LCD3 LCD Meter for S-Series Controlers ($29)
It only fits S series controllers. It is not suitable for other controllers.
https://bmsbattery.com/ebike-kit/670-s-lcd3-lcd-meter-for-s-series-controlers-ebike-kit.html?search_query=S-LCD3+LCD+Meter+for+S-Series+Controlers&results=3 - Battery: 36V12.5Ah Case-08 Bottle Battery Pack Without Controller [$196]
Continuous discharge current: 18A → I think this is enough to provide the amperage required by the controller. This controller is rated at about 10amps.
https://bmsbattery.com/ebike-battery/785-36v145ah-case-08-bottle-panasonic-battery-pack-battery.html?search_query=36V12.5Ah+Case-08+Bottle+Battery+Pack+Without+Controller&results=1
Second option: Controller, Display & Battery:
- Battery & controller: 36V10Ah Bottle-09 E-Bike Battery Pack with a 20A sine wave controller inside. [244$]
Packing List:
1. A 36V10Ah battery pack included a 20A sine wave controller and a EMC-180 charger.
2. One S-LCD3, One Thumb throttle, A pair of Brake Grip, One PAS And Waterproof Easy Assemble Wires.
Notice:
1. Please download controller to motor waterproof wire diagram to make sure if it fits your motor.
2. It only fits the motor with inner speed sensor. Please make sure your motor has inner speed sensor. It doesn't fit the external speed sensor.
https://bmsbattery.com/ebike-battery/731-36v10ah-bottle-09-e-bike-battery-pack-battery.html?search_query=36V10Ah+Bottle-09+E-Bike+Battery+Pack&results=12
Brakes: I have Magura HS33 hydraulic brakes on my bike.
- Magura pressure switch for E-bike (2x22,27€)
Are there alternatives? These pressure switches seems difficult to find...
http://www.hibike.com/magura-pressure-switch-for-e-bike-for-all-rim-and-disc-brakes-schliesser-pd897c030ae9484fb91d5aea4278c224f
Padel assistant sensor:
- PAS--Pulse Padel Assistant Sensor With 12 PCS Magnets ($6,90)
https://bmsbattery.com/ebike-parts/504-pas-pulse-padel-assistant-sensor-with-12-pcs-magnets-parts.html
Torque armes:
- A Pair of EBike Torque Arm (M12: $15)
https://bmsbattery.com/ebike-parts/450-a-pair-of-ebike-torque-arm-parts.html#/301-size-m12
Speed sensor:
- King Meter Speed Sensor
https://bmsbattery.com/ebike-kit/661-king-meter-speed-sensor-ebike-kit.html